Power carriage return mechanism and safety features



July 254, 1951 w. A. ANDERSON POWER' CARRIAGE RETURN MECHANISM AND SAFETY FEATURES Filed April 14, 1948 4 Sheets-Sheet 1 JNVENToR.

WALTER A ANDERSON ATTORNEY POWER CARRIAGE RETURN MECHANISM AND SAFETY FEATURES Filed April 14, 1948 July 24, 1951. w. A. ANDERSON 4 Sheets-Sheet 2 .9mm/:fat WAL TER A. VERSN Eil? . sg@ S,

S. NH.

July 24,' 1951 w A. ANDERSON 2,561,552

POWER CARRIAGE RETURN MECHANISM AND vSAFETY FEATURES Filed April 14. 1948 4 Sheets-Sheet 5 ad g. AFE' Jf/ W4 /ff l im jy/95 E IN VEN TOR.

WAL TER A, .ANDERSON July 24, 1951 wP A. ANDERSON 2,561,552

PowER CARRIAGE RETURN MECHANISMl AND SAFETY FEATURES Filed April 14, 1948 4 sheets-sheet 4 IN V EN TOR.

WALTER A. .A1/VDE R50/V ATTORNEY Patented July `24, 195i Walter A. Anderson, Bridgeport; Conn., assgnor to Underwood'CorporatiomNew York, N. Y., a

corporation of Delaware Applicata@ April 14, 194s, seriai'Nu. 20,888 1c claims. (o1. ici-66') This* invention` isl a continuatonin part ofapplication No.-679,722, filed-June 27,1946, now Patent No. 2,536,524-, dated January-2,1951, andv relates in general -to power-driven carriage returnmechanisms for business machines, and particularly to provision for softly starting thefcarriage on its returnmovements, andto certain safety features inconnection with power cyclingthemachine and power-returning the carriage.

ift is one object o'fthe-invention to provide an efficient power-driven carriage return mechanism including eflicient'means for softened or shock'- les's' pick-upv of the carriage during carriage returning operation.

It is a further-*object of the invention in connection'with power-returning the carriage to pro'- videf eflicient means to soften also the shock of pickingupV the carriage should it at the timeA of Acarriage return institution be executing a tabulating run;`

The structure of the invention provides' for 'impartation of power-return motion to the carriageV through the medium of elastic means, so that when a tabulating run of the carriage is to' ',bel interrupted and followed by aV power-return thereof, theV conditioning of the power-return mechanism will not immediately reverse the movement of the carriage, but will become effec- :tively active only-*after said elastic meanshas ,been strained sufficiently to overcome the tabu .latin'g'vinertia of thecarriage.

This tabulating movement of the carriage vwhich takes place during the straining of; the

Ielastic means may be sufficient to institute an .automatic machine cycle under conventional tap- -pet control of the carriage and approximately at the time when the carriagebeginsvto receive its power-return motion. This is undesirable inasmuch as the machine is not required to cycle at this time, and, moreover, since a machine cycle under certain circumstances may give troublesome results, such as a complete lock-up of the machine and consequent damage to parts of the machine.

It is therefore another object of the invention tov provide in association with shock-less carriage return provision, efficient means to prevent cy,- cling of the machine while the carriage isexe- -cuting a power-return.

Furthermore, it is an object to provide simple and efficient means which under all circumstances will negative the possibility of a concomitant carriage return run and a machine cycle.

'I'he f invention has beenapplie'df toi a wellknown Sundstrand accounting machine, the fundamental features` of which are disclosed in the patents to Sundstrand, Nos. 2,194,270 and 2,209,240, dated respectively, March 19,1940, and

July 23, 1940, and some improved features of which are shown in said application of which this application is a continuation in part.

Referring now to the drawings- Figure 1 is a side sectional view of the`upper portion-of a Sundstrand accounting machine embodying the invention, and including a papersupportingcarriage, l Y Y Figure 2 is a diagrammatic view showingv a work-sheet and related carriage-supportedV functioncontrol magazines,

Figure; 3 is a bottom view of a carriage returnl rack and a driving gear, and a novelshock-cushioning` provision associated therewith. The front ofA the machine is facing the reader and the parts are shown in their normal relations,

Figurefl is a frontal View of the mechanism seen-in Figure 3, with the parts kalso illustrated in their normal relations,

Figure 5 is a bottom view similar to Fig.- ureVV 3- but the carriage return rack isV shown in the process'of picking up the carriage with a lag, through the intermediary of elastic means,

Figure 6 isl a front fragmentary representation of some of the parts illustrated in' Figure 5 in the sameI position,

Figure 'l is a sectional rear view showing the carriage-return mechanism of the invention in a normal, ineffective condition, the carriage being held in-one of the columnar positions by one of the function control magazines 20,

Figure-8 is an illustration similar to Figure 7, but the carriage is shown in the process of eXecuting'r afrtaubulating movement, and a carriage return clutch is shown as having been closed incidental-tosuch tabulating movement, and with the result of blocking or incapacitating the usual cycle instituting mechanism, l H

Figure 9 is a ViewV similar to Figures 7 and 8 showing the carriage advanced in its-tabulating movement to a cycle instituting position, the carriage return clutch during such carriage advancement' having become closed and the automatic cycle instituting means having consequently becomelincapacitated,

Figure 10 isa fragmentary front perspective view looking downward from the left onto the carriage vreturncontrolV mechanism in its normal condition,

FigureY ll'is a fragmentary rear view similar to Fig-,urel 7,v showing the carriage return control mechanism blocked against return instituting movement, by carriage operation of the cycle instituting means.

Referring now to Figure 1, a carriage generally designated by the reference character l is mounted to ride on a frame supported track member by means of front and rear carriage rails I2 and I3 respectively, which have guideway communication with said track member by means including anti-friction elements I4. Said carriage I0 includes widely spaced end plates I5 Wherebetween there extends a work-sheet supporting platen I6.

The carriage is constantly urged leftwardly under the tension of a spring-drum and drawband device designated by the numeral I1, in a conventional manner. A usual tabulating dog I8, in conjunction with any one of several function control magazines 2|) on the carriage, is instrumental to hold the carriage normally in one of a number of possible columnar positions. Said control magazines are of conventional structure and are adjustably carried on the carriage I0 by means including a plate 2| and a rack 22 that are coextensive with the carriage. The individual magazines 20 carry cycle instituting tappets 23 and various other function controlling tappets 24, as may be called for in satisfaction of different accounting applications.

The tabulating dog I8 is part of a tabulating escapement including also a holding dog 21 which is normally located below the traveling path of the magazines 20, see Figure l. During each cycle, or as a result of an operation of a tabulator key, not shown, said escapement dogs I8 and 21 are first respectively lowered and raised, and then restored in a manner well known, and disclosed in said Patent No. 2,194,270, thereby to free the active control magazine 28 for a tabulating movement of the carriage under action of said drawband device I1, and subsequent interception of the carriage in the location corresponding to the next columnar position defined by a control magazine 20.

As any magazine 20 having a cycle instituting tappet 23 approaches the tabulating dog |8 during a tabulation, it is adapted to depress a cycle instituting selector 2B of conventional structure, situated on the stationary part of the machine.

This selector comprises a cam element 29 for f downward camming contact by whatever tappets 23 that may be provided, such contact being made during tabulating advance of the carriage, thereby to operate a lever 3| pivoted at 32. The swinging end of the lever 3| overlies a vertically disposed rod 33 of a conventional mechanism, not further shown, which is effective upon depression of the lever 3| to trip the machine cycling mechanism. Said conventional mechanism is spring restored for the rod 33 to press normally the lever 3| upwardly into contact with an abutment 29a, as seen in Figure '7. Operation of the lever 3| is effected impositively by providing the cam element 29 not directly on the lever 3|, but on an arm 34 that is pivotally carried on the lever` 3|, as at 35. A spring 36 between the lever 3| and the arm 34 serves to yieldingly transmit cycle instituting motion from the arm 34 to the lever 3|. The normal relation between the arm 34 and the lever 3| is established by an abutment provision therebetween, as at 31, see Figure 7.

It will be seen that if for any reason the lever 3| should be blocked against depression, the cycle instituting tappet 23 is capable of passing over the cam element 29 idly, the arm 34 being 4 merely yielding upon the lever 3|. The cam element 29 is pivotally supported upon the arm 34, and a stop 39 and a spring 4U provide that it will be effectively operated by a tappet 23 only during advance movement of the carriage.

Power return mechanism for carriage The work-sheet-supporting carriage IJ may be caused to return under the power of the same elecric motor, not shown, that cycles also the machine, and power-returns 0f the carriage may be instituted either automatically under control ofthe carriage or under manual control.

Referring more particularly to Figure 1, the machine includes a vertically disposed shaft 458 which at its lower end has fast thereon worm gear 451 that is constantly driven by said motor while the machine is in operation. Slidably splined for vertical movement on said shaft 458 is a toothed clutch member 460 for engagement with another toothed clutch member 46| which is integral with a gear 462. This gear is rotatatively loose on the shaft 458 and in constant mesh with a carriage return rack 463. Said clutch members 460 and 46| are normally separated, as shown in Figures 1 and 7, so that the gear 462 is idly in mesh with the carriage return rack 463. The latter is carried on the underside of the carriage rail I3, and the shaft 458 has a pivotal bearing at its upper` end in the frame supported track member I, and at its lower end in a frame supported shelf 461.

The clutch member 460 may be shifted into cooperative relation with the clutch member 46| by I a depression of a carriage return key 468. see

Figure 10, which is part of a lever 469 that is pivoted at 410, and has its rear end underlie a horizontal part 41| vof a clutch closing slide 413 supported for vertical movement on the framework of the machine. The aforesaid part 41| is in communication with an annular groove 419 in the clutch member 460, Wherefore operation of the carriage return key 468 results in the meshing of the carriage return clutch members 460 and 46|, to cause the carriage to be motor returned rightwardly as seen from the front of the machine. As will become evident later, power returns of the carriage are terminated automatically under control of the carriage.

`The machine provides for automatic institution of carriage returns under control of the carriage, and this, so far as it is thought necessary for an understanding of the invention, will presently be described.

Referring more particularly to Figures 1 and 1G, a stud 48D on the frame-work of the machine, has rockably supported thereon a unitary structure designated by the general reference numeral 482. This unitary structure 482 includes a horizontal arm 484 which at its left end carries a forwardly reaching stud 493 having an operative connection with the clutch closing slide 413 at 494. It will be seen that if the unitary structure 482 is rocked clockwise as viewed from the front, it will close the clutch 460, 46|. Conversely, if the unitary structure 482 is rocked anti-clockwise, the same clutch will be opened. The said unitary structure 482 is oppositely rockable under control of the carriage, and to this end includes a rightwardly extending arm `4,88 having a rearward projection 500 formed with an up-reaching and a down-reaching lug, 50| and 502, respectively. These lugs are engageable for clockwise and anti-clockwise rocking of `the unitary structure 482 respectively. byV return instituting elements RI, R2, and return terminating elements RTI and RT2. Referring to Figures l and 10, the lugs 50| and 502 are normally situ-ated in a vertical plane Which lis'comrnon with the carriage return instituting element R2 and the carriage return terminating element RT2.-

The various return instituting and return' terminating elements are adjustably carried upon a' bar 504 extending intermediate of the two carriage ends I5 at the rear. They may be given any position along the bar 504 and for that purpose are carried upon individual securing devices indicated at 505 in Figure 1. When during carriage advance the control element R2 encounters the lug 50|, the unitary structure will receive a clutch closing motion about the stud 480. `Conversely, as the return terminating element RT2 during an instituted return engages the lug 502, the return will be automatically terminated, said unitary structure 482 effecting the shift ofthe clutch 460, 46|, to open condition. The unitary structure 482 has associated therewith a springpressed detenting element 520 which is effective to hold it in either open or closed clutch position.

The unitary structure 482 is adapted to be given a position rearwardly of that shownin Figure 1 and the lugs 50|, 502, will then be incooperative range with the return instituting and return terminating elements RI and RTI, respectively, thereby to cause automatic return from a position in advance of the return instituting element R2, and to cause also earlier return termination. The illustrated specific provision land arrangement of the elements RI, R2, RTI and RT2 is to be considered exemplary only, and there may be additional such elements as disclosed in said application No. 679,722.

The unitary structure 482 is placeable in its rearward Aposition by operation of a key 521 which, although marked shuttle key in the drawings, may be more properly named a Return control modier. The key 521 is on the front end of a lever 528 which when operated imparts a turning movement to a shaft 528 having at the left extremity a down-reaching arm 53|. An arm 533, loosely pendant from a shaft in the machine, carries a pin 534 which reaches rightwardly in front of the arm 53|, and leftwardly into a slot 535 of a rearwardly extending link 536, the pin 534 having a retainer head for the link. At the rear, the link 536 is supported for foreandaf t sliding movement in the frame, in a manner not shown, and has a rightward reach 531 in communication with a notch provided in the clutch shifting stud 493 of the unitary' rocker structure 482. A light spring 540 constantly urges the arm 533 and therefore also the unitary structure 462, rearwardly. A relatively stronger return spring 54| associated with the key lever 528, is capable and normally overcomes the power of the spring 540, so that normally, as seen in Figure 10, the rocking structure 482 is in its forward position; a spring 542 arranged between the link 536 and the arm 533 provides a resilient connection therebetween which causes the rocking structure to be drawn to normal position by the spring 54|.

It will thus be seen that by depressing the shuttle key, the unitary structure 482 will assume a rearward position placing the lugs 50| and 502 in the operating plane of the control elements RI and RTI. The rocking structure 482 Iis caused to reassume its forward, normal position in a manner disclosed in the said applicationy No. 679,722 but the manner in which this is ac-`v complishedneed not be known in connection with the present invention.

""It'is understood that the return instituting and the return terminating elements are all operative upon the lugs 50|, 502 by camming action,K andv that these lelements allow over-travel ofthe carriage beyond the control positions defined' thereby. Thus incident to any return institution by carriage travel, the carriagel is brought to a stop and is reversed by the return driving "mechanism, `and not by any stopping engagement of the lug 50| with either of the described return instituting elements RI, R2. The carriage return instituting elements are usually arranged to function as the .carriage is tabulating out of a column defined by one or another o'f the columnar control magazines 20.

According to one main feature of the invention the power-return mechanism for the carria-ge includes means whereby the carriage is set in motion through the medium of elastic means providing shock-less pick-up of the carriage; such means is provided to function effectively whether the carriage is returned after being stationary Aor while executing a tabulating movement.

-The setting in motion of the carriage I0 requires 'considerable effort, and said elastic means provides for a start of the carriage on its return without undue strain on the motor, besides start-r ing it smoothly and without objectionable shock and'noise. 'Referring particularly to Figures 3, 4, 5 and 6, inclusive, all of which are views showing the mechanism turned over in the direction of movement of the carriage, the carriage;

return rack 463 is set in motion substantially immediately by the carriage return gear 462 after the carriage return clutch 460, 46| has been closed. However, the heavy carriage I0 is set in motion relatively gradually by reason of the rack 463 on the carriage having an elastic motion transmitting connection with the carriage, in the formofheavy springs 560. More particularly, the'carriage return rack 463 is provided with a series of slots 56| at spaced locations therealong for guiding movement longitudinally of the carriage by bushings 562 that are carried and held fast on the carriage by means of screws 563 and 5630,. By reason of the springs 560, the rack is normally movable on the carriage in carriage return direction only, as seen in Figures 3 and 4, and also in Figures 'I and 8. Each of the springs 560 has one end anchored to a pin 564 on the return rack 463, and has the other end attached to an anchorage plate 565 which is connected with the carriage by a shouldered bushing 566 underlying one of the bushings 562 and rmly united with the latter and the carriage by one of the screws 563. A reduced portion of the bushing 566 is contained in a hole o the plate and spaces the head of the screw 563 with a slight clearance from the plate so that the plate isnot clamped tight. From the drawings it will be seen that there are fewer springs 560 and plates 565, than there are rack-guiding slots 56 I. The bushings 562 are of eccentric form and have enlarged hexagon heads 568 for turning them and thereby to adjust the rack transversely of the carriage, at spaced locations, into proper mesh with the carriage return gear 462. The normal lengthwise position of the rack on the carriage is determined under the inuence of the springs 560 by stopforming bushings 51| of brous or other sounddeadening material contained in slots 512 provided in the plates 565, and held fast on the carrlage rail bar I3 by screws 510. The limits of movement established by the bushings 51| in conjunction with the slots 512 prevent the rackguiding bushings from ever contacting the opposite ends of the slots 56|.

When the carriage return is instituted, either with the carriage at rest or in tabulating motion, the carriage will not immediately commence to travel in carriage return direction, but the springs 560 will stretch to some extent until the inertia of the carriage has been overcome. This is after the rack has been drawn an indefinite but short distance along the carriage, as illustrated in Figures 5 and 6. Then gradually the carriage recovers its normal position relatively to the rack under the urge of the strained springs 560, the latter of which are carefully chosen to strain initially but to recover thereupon as the inertia of the carriage is gradually overcome.

Return movement of the carriage commences at a point where the force of the stretched springs 560 is balancing the combined force of the carriage advancing spring |1 and the inertia of the carriage, the reversal of motion being effected smoothly and without objectionable and harmful Jar.

. Several friction elements 514 are' associated with the carriage rack 463 to slow down or impede the movement of the carriage as the latter reassumes normal relation with the rack after the springs 560 start to recover. This is to reduce shock and noise at this reverse phase of operation. The friction elements 514 are in the form of bowed spring leaves clamped to the carriage by the screws 563a along with the associated bushings 562. Said friction elements bear under tension against the carriage return rack, as at 513.

`The aggregate friction exerted causes the carriage to recover its normal position relatively to the rack at a pace slow enough to minimize the impact of the plates 565 at the slots 512 against the ber bushings 51|. The friction element 514 has lugs 515 in slidable contact with the rack 463 to prevent turning on the screw. Inasmuch as the inertia of the heavy carriage is considerable. the relatively light friction of the elements 514 against the rack exerts no appreciable influence to urge the carriage to move with the rack at the outset of the carriage return operation.

By way of example, there is shown in Figure 2 a work-sheet 45 having a plurality of columns including a first column 46, a penultimate column 41 and a final column 48. Function control magazines are schematically represented in association with said work-sheet and determine the tabulating positions of the carriage in connection with the different columns thereon. Only the magazine 20 that is associated with the final column is shown equipped with an automatic cycle tripping tappet 23. This tappet may institute an automatic cycle for the taking of an automatic total in the final column. The amounts entered in all, except the final column, are key indexed, and the machine cycles necessary in connection therewith are instituted under control of the usual cycle key, not shown. Appropriate function control tappets 24 on the various magazines 20 provide that in the various columns one or more desired registers are active, either additively or subtractively, and that in the final col-- 8 2, the reloading of the transfer mechanism in preparation to the total printing cycle in the final column 48 is assumed to have taken place in a preceding column wherein the register from which the total is finally taken is inactive. This may be in the penultimate column 41.

Due to the requirement in the Sundstrand machine for a reloading of the transfer mechanism preparatory to the automatic taking of a total of a certain register, it may in some instances be necessary to provide an extra function control magazine directly preceding the total printing column for automatically cycling the machine for this purpose.

In any event, the machine cycles automatically in the total printing column, and the carriage tabulating escapement I8, 21 is consequently operated, wherefore the carriage advances beyond the nal column. In doing so the return instituting element R2 encounters the lug 50|, thereby depressing it and causing the carriage return clutch 460, 45| to close. The dot and dash line 49 in Figure 2 represents the tabulating and return motion executed by` the carriage following a total printing operation in the nal column 48, and the point 49a on this line indicates where the carriage return clutch is closed.

The Work may, however, require additional postings in an additional line before the printing of a total in the final column 48. This calls for a return of the carriage from the penultimate column 41. To condition the machine for this, the aforedescribed shuttle key 521 is operated at any time prior to cycling the machine in the penultimate column. This will place the lug 50| into cooperative range with the return instituting element RI, which is so located that the carriage in tabulating a little past the penultimate column will automatically cause a return to the second column. The dot and dash line 49b in Figure 2 represents the motion executed by the carriage in this case, and the point 49c indicates where the carriage return clutch is closed.

It will be noted that if the magazine 20 of the final colmn 48 is closely located to that of the penultimate column, the tabulating movement of the carriage is likely to be of sufiicient magnitude to cause the cycle trip tappet 23 to reach the cycle trip selector 2B before the actual return movement of the carriage commences to get under way, it being remembered that the carriage is picked up resiliently with a lag. But a cycle must not occur while the carriage is returning, since this is undesirable and might tie up and damage the machine, as already stated. Accordingly, it is conceived to provide against effective operation of the cycle selector 28 whenever the carriage return clutch receives a closing movement.

Referring now to the rear view of Figure 7, it will be perceived that if the clutch closing rocker 482 is assumed to be in its normal, forward position, the next tabulating movement will cause a cycle to be instituted by reason of the cycle lug 23 engaging the cam element 29, and further that in consequence of a cycle so instituted the carriage will tabulate a short distance past the final column and that the return instituting element R2 will consequently become active on the rocker 482 to close the carriage return drive. Still referring to Figure 7 it will also be perceived that if the rocker 482 is assumed to have been moved to its rearward position through operation of the shuttle key, for making additional postings as explained above, the next tabulating yammira movement of the carriage ensuing upon the cycling of the machine will cause the carriage return clutch 460, 6l to close by the coaction of the return instituting element Rl with the lug 50|, see Figure 8. For a short time thereafter the carriage will continue to proceed in tabulating direction due to the elastic pick-up provision between the carriage return rack 463 and the carriage, as well as for the reason that the carriage return drive includes preferably also a slip clutch, not shown. The carriage may therefore tabulate to or past the position illustrated in Figure 9 wherein the cycle trip tappet 23 is shown as having reached and depressed the cam element 29 of the cycle instituting selector' 28. In Figure 9 the elastic or spring means 560 has been strained and at the next instant the carriage reverses its motion shocklessly.

It is a feature of the invention to eliminate the possibility of a cycle after the carriage .return drive is closed and while the carriage may yet be proceeding in tabulating direction and consequently a cycle instituting tappet 23 may advance over the cam element 29, To this end the cycle tripping selector 28 is blocked against effective operation whenever the carriage return clutch 460, 45| is closed. Specifically, see particularly Figures 7 to 9, there is arranged upon a frame supported stud a blocking element 5| in the form of an upright lever. This blocking element 5l has an upper end which is normally clear of a protuberance 52 reaching downwardly from the cycle selector lever 3|. Said lever or blocking element 5I is connected to the rocking structure 482 of the carriage return clutch closing mechanism by a link 53. So long as the clutch is open, as seen in Figure 7, the selector lever 3| with its protuberance 52 is free to descend. However, when the structure 482 is rocked to close the carriage return drive, either by control of the elements RI, R2 on the carriage or by the carriage return key 468, the blocking element 5| will be rocked to place its upper end underneath the protuberance 52, see Figure 8. If then, due4 to continued tabulating movement of the carriage, a cycle tripping tappet 23 should ride onto the camming element 29, as depicted in Figure 9, the result will be that the cam element will be idly operated, inasmuch as the selector lever 3| is blocked, and inasmuch as the spring 3B allows idle depression of the cam element and its supporting arm 34. The joints at opposite ends of the link 53 are sufficiently loose to permit the unitary rocking structure 6132 to be moved freely fore-and-aft as required.

The aforedescribed safety `feature permits close arrangement of the columns in a machine wherein the motion of the carriage is not immediately reversed at the closure of the carriage return drive, and particularly wherein provision is made for the return drive to pick up the load carriage by a yielding provision.

Obviously, the described incapacitating means for the cycle selector is operative whether the carriage return clutch is closed under carriage control or by operation of the carriage return key 468.

Moreover, the mechanism is of a construction so that upon depression of the-cycle tripping selector 28, as illustrated in Figure l1, it is impossible to'rock the carriage return clutch closing structure 482 to closed clutch position, inasmuch as then the selector protuberance 52 is blocking the blocking lever 5l in'normal posidirection, means What is claimed is:

l. In a business machine having a carriage movable in advance and in return direction on a frame, means to tabulate the carriage in advance direction, including impositive carriage advancing means, normally ineiiectively conditioned power-means for returning the carriage, including, a motor-operable gear on the frame, a rackbar associated with said gear for endwise movement thereby to return the carriage, and elastic means to transmit carriage returning motion from said rack-bar to the carriage, and means oppositely on the carriage and the frame to effectively condition said power-means in response to the carriage tabulating past a certain position, but without itself halting the carriage, said elastic means being resilient enough to strain as the power-means acts initially against the inertia of the carriage, but being strong enough to overcome subsequently the inertia of the carriage to drive the carriage in return direction.

2. In a business machine having a carriage movable in opposite directions on a frame, means constantly urging the carriage to move in one direction, tabulating means normally in control of the carriage, operable to cause the urging means to tabulate the carriage in said one direction, normally ineffectively conditioned powermeans for drivin-g the carriage in the other direction, and including elastic motion transmitting means, and means to condition said power-means for driving the carriage, said elastic means being weak enough to be strained from a normal condition as the power-means initially acts against the inertia of the carriage, but being strong enough to overcome gradually the inertia of the carriage and then to recover normal condition while at the same time driving the carriage in said other direction.

y 3. In a business machine having a carriage of considerable mass movable in opposite directions, a member movable in one of said directions for drivingthe carriage in this direction, means to power-move the member in at least said one including elastic means to transmit movement from said member to the carriage in said one direction, said elastic means kbeing weak enough to strain transitorily at the outset of the power movements imparted to the member and allowing the carriage to lag behind, but being strong and elastic enough to overcome gradually the inertia of the carriage and to cause the carriage to catch up with the member rafter considerable movement of the latter, and

means to control the speed of movement with which the carriage is able to catch up with the member.

4. In a business machine having a carriage of considerable mass movable in opposite directions, a bar movable endwise in one of said directions for driving the carriage in this direction, means to power-move the bar in at least said one direction, means including elastic means to transmit ymovement from said bar to the carriage in said one direction, said elastic means being weak enough to strain transitorily at the outset of the power movements imparted to the bar and allowing the carriage to lag behind, but being strong and elastic enough to overcome gradu- .ally the inertia of the carriage and to cause the carriage to catch up with the bar after considerable movement of the latter, and friction means between the bar and the carriage to control the 'ecoutez speed of movement with which'the vcarriage is able to catch up with the bar. y

5. In a business machine having a carriage'of considerable mass movable in advance and return directions, means constantly urging the carriage in advance direction, means normally holding the carriage at rest against advance, operable to cause tabulating runs thereof under the influence of said urging means, a rack-bar movable endwise in carriage return direction, means including a gear associated with the rackbar, to power-move the latter in return direction, spring means to transmit motion from said rack-bar in carriage return direction to the carriage, said spring means being weak enough to strain at the outset of the power movements imparted to the rack-bar and while the carriage may be either at rest or executing a tabulating run, thus allowing the carriage to lag behind with respect to the movement of the rack-bar in return direction, and strong enough to overcome gradually the inertia of the resting or tabulating carriage after some power movement of the rack-bar in return direction, and being also strong enough to cause the carriage to catch up with the rack-bar after considerable movement of the latter, and means to control the speed with which the carriage can catch up with the rackbar.

6. The combination in a business machine comprising, machine cycling means, a carriage advanceable in tabulating movements in one direction to different columnar positions, and cycle instituting means operated automatically incident to a tabulating advance of the carriage in reaching a certain cycle instituting point; of normally ineffectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, means to condition said power-return means for operation while the carriage may be approaching and subsequently reaching said cycle instituting point, said elastic motion transmitting means being weak enough to strain initially after the powerreturn means is conditioned for operation, and thus allowing momentary continued tabulating travel of the carriage, permitting the latter to reach said cycle instituting point before imparting return movement to the carriage, and means operated automatically in consequence of the conditioning of the power-return means for operation, to incapacitate said carriage-controlled cycle instituting means. l

'7. The combination in a business machine comprising, machine cycling means, a carriage advanceable in tabulating movements in one vdirection to different columnar positions, and cycle instituting means operated automatically incident to a tabulating advance of the carriage in reaching a certain cycle instituting point; of normally ineffectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, means to condition said power-return means for operation while the carriage may be approaching and subsequently reaching said cycle instituting point, said elastic motion transmitting means being weak enough to strain initially after the powerreturn means is conditioned for operation, and thus allowing momentary continued tabulating travel of the carriage, permitting the latter to reach said cycle instituting point before imparting return movement to the carriage, the automatic cycle instituting means of the machine comprising, a member adapted for cycle instituting operation, and impositive operating means therefor, and means operated automatically in consequence of said conditioning of the powerreturn means, to block said member against effective operation.

8. The combination in a business machine comprising, machine cycling means, a carriage advanceable in tabulating movements in one direction to different columnar positions, and cycle instituting means operated automatically incident to a tabulating advance of the carriage in reaching a certain cycle instituting point; of normally ineflectively conditioned power-return means for the carriage, embodying impositive means for transmitting motion to the carriage, means to condition said power-return means for operation, said impositive motion transmitting means allowing momentary continued tabulating travel of the carriage after the conditioning of the power-return means, permitting the carriage to reach said cycle instituting point before 'nnlparting return movement to the carriage. and

means operated automatically in consequence of the conditioning of the power-return means to incapacitate the carriage-controlled cycle instituting means.

9. The combination in a business machine comprising, machine cycling means, a carriage advanceable in tabulating movements in one dlrection to different columnar positions, and cycle instituting means operated automatically incident to a tabulating advance of the carriage in reaching a certain cycle instituting point; of normally ineffectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, carriage controlled means to condition said power-return means for operation in response to a tabulating movement in approach of said cycle instituting point, said elastic motion transmitting means being weak enough to strain initially after the power-return means is conditioned for operation, and thus allowing momentary continued tabulating travel of the carriage, permitting the latter to reach said cycle instituting point before imparting return movement to the carriage, and means operated automatically in consequence of the conditioning of the power-return means for operation, to incapacitate said carriage-controlled cycle instituting means.

l0. The combination in a business machine comprising, machine cycling means, a carriage advanceable in tabulating movements in one direction to dilerent columnar positions, and cycle instituting means operated automatically incident to a tabulating advance of the carriage in reaching a certain cycle instituting point; of normally ineffectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, means to condition said power-return means for operation, said elastic motion transmitting means being weak enough to strain initially after the powerreturn means is conditioned for operation, and thus allowing momentary continued tabulating travel of the carriage, permitting the latter to reach said cycle instituting point before imparting return movement to the carriage, and means operated automatically in consequence of the conditioning of the power-return means for operation, to incapacitate said carriage-controlled cycle instituting means.

l1. The combination in a business machine comprising, a machine cycling means, a carriage advanceable in tabulating movements in one direction to diierent columnar positions, and carriage-controlled cycle instituting means; of normally ineifectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, means to condition said power-return means for operation, and automatically operative means to incapacitate said carriage-controlled cycle instituting means incidental to the conditioning of said power-return means, and to incapacitate said power-return conditioning means incidental to the operation of said cycle instituting means by control of the carriage.

12. The combination in a business machine comprising, a machine cycling means, a carriage advanceable in tabulating movements in one direction to different columnar positions, and carriage-controlled cycle instituting means; of normally ineiectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, means to condition said power-return means for operation, and automatically operative means to block said carriage-controlled cycle instituting means against operation incidental to the conditioning of said power-return means, and to block said power-return conditioning means against conditioning operation incidental to the operation of said cycle instituting means by control of the carriage.

13. In a business machine having a carriage movable in opposite directions on a frame, means constantly urging the carriage to move in one direction, tabulating means normally in control of the carriage, operable to cause the urging means to tabulate the carriage in said one direction, normally ineffectively conditioned powermeans for driving the carriage in the other direction, and including elastic motion transmitting means, means to condition said power-means for driving the carriage, said elastic means being Weak enough to be strained from a normal condition as the power-means initially acts against the inertia of the carriage, but being strong enough to overcome gradually the inertia of the carriage and then to recover normal condition while at the same time driving the carriage in said other direction, and means to control the speed at which the elastic means recovers normal condition.

14. In a business machine having a carriage of considerable mass movable in advance and return directions, means constantly urging the carriage in advance direction, means normally holding the carriage at rest against advance, operable to cause tabulating runs thereof under the influence of said urging means, a bar movable endwise in carriage return direction, means to powermove said bar in return direction, means to render said power-moving means effective in response to a tabulating run of the carriage, key means, means responsive to said key means to render said power-moving means effective, and means including elastic means to transmit motion from said bar in carriage return direction to the carriage, said elastic means being weak enough to strain from a normal condition at the outset of the power movements imparted to the bar and while the carriage may be either at rest or executing a tabulating run, thus allowing the carriage to lag behind with respect to the movement of the bar in return direction, but being strong enough to overcome gradually the inertia of the resting or tabulating carriage after some power movement of the bar in return direction, the elastic means recovering normal condition While at the same time driving the carriage in return direction.

15. The combination in a business machine comprising, a frame, a machine cycling means, a carriage advanceable in tabulating movements in one direction on said frame to different columnar positions, and cycle instituting means comprising tappets on the carriage and means on the frame operable by said tappets to institute cycles; of normally inefectively conditioned power-return means for the carriage, embodying impositive means for transmitting return motion to the carriage, and means to condition said power-return means for operation and concomitantly to condition said cycle instituting means for ineffectiveness of the tappets on the operable means.

16. The combination in a business machine comprising, a frame, a cycling means, a carriage advanceable in tabulating movements in one direction on said frame to different columnar positions, and carriage-controlled cycle instituting means comprising cycle-instituting tappets on the carriage and means on the frame operable by said tappets to institute cycles; of normally ineifectively conditioned power-return means for the carriage, embodying elastic means for transmitting motion to the carriage, and means to condition said power-return means for operation and concomitantly to block said operable means of the cycle instituting means against operation.

WALTER A. ANDERSON` REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,580,534 Rinsche Apr. 13, 1926 1,582,788 Schluns Apr. 27, 1926 1,901,135 Sundstrand Mar. 14, 1933 2,082,098 Christian June 1, 1937 2,451,631 Moellenbeck et al. Oct. 19, 1948 

